Is there a way to access keys from values?

Question

If I print something like:

example = {"Example_Key" => "Example_Value"}
example["Example_Key"]

the interpreter will return "Example_Value"what is the value. Is there a way to enter a value and get the key?

Answer 1

Yes there is:

example = {"Example_Key" => "Example_Value"}
example.key "Example_Value" # => "Example_Key"

Check out the documentation Hash#key

Returns the key for a given value.. If the valuenot found, returns nil.

Answer 2

You can create a hash that works differently:

inverted = example.invert # => {"Example_Value"=>"Example_Key"}
inverted["Example_Value"] # => "Example_Key"